公开(公告)号：CA2284673A1

公开(公告)日：1998-10-08

申请号：CA2284673

申请日：1998-03-25

Applicant: QUALCOMM INC

Inventor： TASSOUDJI ALI ,  FILIPOVIC DANIEL

IPC: H01Q1/38 ,  H01Q1/36 ,  H01Q11/08

Abstract: An area-efficient network is configured such that a section of the feed network (1804, 1808) is disposed on a radiator portion of an antenna (1304, 1308) and the remainder of the feed network is disposed on a feed portion. Because part of the feed network is disposed on the radiator portion, the remainder of the feed network requires less area on the feed portion. As a result, the feed portion of the antenna can be smaller as compared to antennas having conventional feed networks. Preferably, the traces of the feed network that are disposed on the radiator portion are disposed opposite the ground portion of the radiators. As such, the ground portion of the radiators serves as a ground plane for this part of the feed network. The area-efficient feed network can be implemented with numerous different types of antennas of varying configurations, including single-band and multi-band helical antennas. As a result of this configuration, the overall size of the antenna and the amount of loss in the feed are reduced as compared to antennas having conventional feed networks.

公开(公告)号：ZA976609B

公开(公告)日：1998-07-29

申请号：ZA976609

申请日：1997-07-24

Applicant: QUALCOMM INC

Inventor： FILIPOVIC DANIEL

IPC: H01Q1/38 ,  H01Q1/36 ,  H01Q11/08 ,  H01Q

Abstract: A bent-segment helical antenna utilizes one or more radiators wrapped in a helical fashion. The radiators are comprised of a plurality of segments. A first segment extends from a feed network at a first end of a radiator portion of the antenna toward a second end of the radiator portion. A second segment is adjacent to and offset from the first segment. A third segment connects the first and second segments at the second end of the radiator portion.

公开(公告)号：CA2261959A1

公开(公告)日：1998-02-05

申请号：CA2261959

申请日：1997-07-31

Applicant: QUALCOMM INC

Inventor： FILIPOVIC DANIEL

IPC: H01Q1/38 ,  H01Q1/36 ,  H01Q11/08

Abstract: A bent-segment helical antenna (700A, 700B) utilizes one or more radiators (720) wrapped in a helical fashion. The radiators (720) are comprised of a plurality of segments (712, 714, 716). A first segment (712) extends from a feed network (730) at a first end (732) of a radiator portion (702) of the antenna (700A, 700B) toward a second end (734) of the radiator portion (702A, 702B). A second segment (714) is adjacent to and offset from the first segment (712). A third segment (716) connects the first and second segments (712, 714) at the second end (734) of the radiator portion (702A, 702B).

公开(公告)号：WO2004021589A9

公开(公告)日：2004-05-06

申请号：PCT/US0327016

申请日：2003-08-28

Applicant: QUALCOMM INC

Inventor： SCHLEGEL NIKOLAI ,  HOLENSTEIN CHRISTIAN ,  FILIPOVIC DANIEL ,  KASTURI NITIN

IPC: H03D3/00 ,  H04B1/30 ,  H04L25/06

CPC classification number: H04L25/063 ,  H03D3/008 ,  H04B1/30

Abstract: An apparatus for coarse compensation of a direct current (DC) offset in a direct to baseband receiver architecture utilizes a serial analog to digital converter (ADC), such as a Delta-Sigma converter, to convert the received signal to digital form. The output of the ADC is sampled for a predetermined number of samples and a counter coupled to the ADC is incremented each time the sample generated by the ADC is a logic one. The counter is not incremented if the sample from the ADC is a logic zero. After the predetermined number of samples is obtained, the counter value is indicative of the DC offset in the received signal. The counter value may be converted by a code converter to a correction value for easy operation of a digital to analog converter (DAC). If the number of samples from the ADC is a power of two, the code converted may be readily implemented by simply inverting the most significant bit (MSB) from the counter to thereby generate a twos complement version of the counter value. The correction value is coupled to the DAC to generate a compensation signal, which is provided to the received signal path in the form of a feedback signal to compensate for the DC offset.

Abstract translation: 用于直接到基带接收机架构中的直流（DC）偏移的粗略补偿的装置利用诸如Δ-Σ转换器的串行模数转换器（ADC）将接收的信号转换成数字形式。 对于预定数量的采样，ADC的输出被采样，并且每当由ADC产生的采样为逻辑1时，耦合到ADC的计数器递增。 如果来自ADC的采样为逻辑0，则计数器不递增。 在获得预定数量的样本之后，计数器值表示接收信号中的直流偏移。 计数器值可以由代码转换器转换成用于容易操作数模转换器（DAC）的校正值。 如果来自ADC的采样数是2的幂，则通过简单地将来自计数器的最高有效位（MSB）反相，从而生成计数器值的二进制补码版本，可以容易地实现转换代码。 校正值耦合到DAC以产生补偿信号，其以反馈信号的形式提供给接收信号路径以补偿DC偏移。

公开(公告)号：CA2739554C

公开(公告)日：2014-07-08

申请号：CA2739554

申请日：2001-03-02

Applicant: QUALCOMM INC

Inventor： YOUNIS SAED ,  SIMIC EMILIJA ,  WILBORN THOMAS ,  ZHANG HAITAO ,  FILIPOVIC DANIEL ,  KAUFMAN RALPH ,  LIN MING JASON YU

IPC: H04B1/04 ,  H03F3/20 ,  H03G3/20 ,  H03G3/30 ,  H04B7/005 ,  H04B7/24

Abstract: Transmitter architectures for a communications system having improved performance over conventional transmitter architectures. The improvements include a combination of the following: faster response time for the control signals, improved linearity, reduced interference, reduced power consumption, lower circuit complexity, and lower costs. For a cellular application, these improvements can lead to increased system capacity, smaller telephone size, increased talk and standby times, and greater acceptance of the product. Circuitry is provided to speed up the response time of a control signal. The control loop for various elements in the transmit signal path are integrated. A gain control mechanism allows for accurate adjustment of the output transmit power level. Control mechanisms are provided to power down the power amplifier, or th e entire transmit signal path, when not needed. The gains of the various elements in the transmit signal path are controlled to reduce transients in the output transmit power, and to also ensure that transients are downward.

公开(公告)号：CA2621522C

公开(公告)日：2012-07-10

申请号：CA2621522

申请日：2001-03-02

Applicant: QUALCOMM INC

Inventor： YOUNIS SAED ,  SIMIC EMILIJA ,  WILBORN THOMAS ,  ZHANG HAITAO ,  FILIPOVIC DANIEL ,  LIN MING JASON YU ,  KAUFMAN RALPH

IPC: H04B1/04 ,  H03G3/20 ,  H03G3/30 ,  H04B7/005 ,  H04B7/24

Abstract: Transmitter architectures for a communications system having improved performance over conventional transmitter architectures. The improvements include a combination of the following: faster response time for the control signals, improved linearity, reduced interference, reduced power consumption, lower circuit complexity, and lower costs. For a cellular application, these improvements can lead to increased system capacity, smaller telephone size, increased talk and standby times, and greater acceptance of the product. Circuitry is provided to speed up the response time of a control signal. The control loop for various elements in the transmit signal path are integrated. A gain control mechanism allows for accurate adjustment of the output transmit power level. Control mechanisms are provided to power down the power amplifier, or th e entire transmit signal path, when not needed. The gains of the various elements in the transmit signal path are controlled to reduce transients in the output transmit power, and to also ensure that transients are downward.

公开(公告)号：CA2621145C

公开(公告)日：2012-07-10

申请号：CA2621145

申请日：2001-03-02

Applicant: QUALCOMM INC

Inventor： YOUNIS SAED ,  SIMIC EMILIJA ,  WILBORN THOMAS ,  ZHANG HAITAO ,  FILIPOVIC DANIEL ,  KAUFMAN RALPH ,  LIN MING JASON YU

IPC: H04B1/04 ,  H03G3/20 ,  H03G3/30 ,  H04B7/005 ,  H04B7/24

Abstract: Transmitter architectures for a communications system having improved performance over conventional transmitter architectures. The improvements include a combination of the following: faster response time for the control signals, improved linearity, reduced interference, reduced power consumption, lower circuit complexity, and lower costs. For a cellular application, these improvements can lead to increased system capacity, smaller telephone size, increased talk and standby times, and greater acceptance of the product. Circuitry is provided to speed up the response time of a control signal. The control loop for various elements in the transmit signal path are integrated. A gain control mechanism allows for accurate adjustment of the output transmit power level. Control mechanisms are provided to power down the power amplifier, or th e entire transmit signal path, when not needed. The gains of the various elements in the transmit signal path are controlled to reduce transients in the output transmit power, and to also ensure that transients are downward.

公开(公告)号：AT504981T

公开(公告)日：2011-04-15

申请号：AT07800027

申请日：2007-08-07

Applicant: QUALCOMM INC

Inventor： FILIPOVIC DANIEL ,  KOMNINAKIS CHRISTOS

IPC: H04B1/10 ,  H04B1/12

Abstract: Techniques for detecting and mitigating intermodulation distortion (IMD) are described. A device (e.g., a cellular phone) obtains digital intermodulation distortion and digitally determines intermodulation distortion in an input signal based on the digital intermodulation distortion. The device may correlate the digital intermodulation distortion with the input signal and determine intermodulation distortion in the input signal based on correlation results. The device may adjust the operation of one or more circuit blocks (e.g., a mixer, an LNA, etc.) in a receiver based on the detected intermodulation distortion in the input signal. Alternatively or additionally, the device may condition the digital intermodulation distortion to obtain conditioned intermodulation distortion matching intermodulation distortion in the input signal and may then subtract the conditioned intermodulation distortion from the input signal.

公开(公告)号：ES2289429T3

公开(公告)日：2008-02-01

申请号：ES04078530

申请日：1998-03-25

Applicant: QUALCOMM INC

Inventor： FILIPOVIC DANIEL ,  TASSOUDJI ALI

IPC: H01Q1/38 ,  H01Q11/08 ,  H01Q1/36

Abstract: Un procedimiento de fabricación de una antena helicoidal que comprende un substrato (406), estando caracterizado el procedimiento por: formar un primer y un segundo plano de tierra (412) sobre dicho substrato (406), estando dicho segundo plano de tierra (412) separado de dicho primer plano de tierra (412); proporcionar una serie de orificios (2230) a través de dicho substrato (406) y dicho primer plano de tierra (412) y a través de dicho substrato (406) y dicho segundo plano de tierra (412); posicionar dicho substrato (406) para que encaje con un elemento de soporte (2310), comprendiendo dicho elemento de soporte (2310) una primera y una segunda serie de dientes (2312) que se extienden radialmente hacia fuera desde una superficie exterior del mismo y están dispuestos de manera que la primera serie de dientes (2312) coincidan con dichos orificios (2230) a través de dicho substrato (406) y dicho primer plano de tierra (412) y que la segunda serie de dientes (2312) coincidan con dichos orificios (2230) a través de dicho substrato (406) y dicho segundo plano de tierra (412), en el cual dichos dientes (2312) están dispuestos de tal modo que al girar dicho elemento de soporte (2310) sobre su eje mayor, dicho substrato (406) se envuelve alrededor del elemento de soporte (2310).

公开(公告)号：DE69735807T2

公开(公告)日：2006-12-21

申请号：DE69735807

申请日：1997-07-31

Applicant: QUALCOMM INC

Inventor： FILIPOVIC DANIEL

IPC: H01Q1/38 ,  H01Q11/08 ,  H01Q1/36

Abstract: A bent-segment helical antenna utilizes one or more radiators wrapped in a helical fashion. The radiators are comprised of a plurality of segments. A first segment extends from a feed network at a first end of a radiator portion of the antenna toward a second end of the radiator portion. A second segment is adjacent to and offset from the first segment. A third segment connects the first and second segments at the second end of the radiator portion.